Find a bunch of pictures on the internet. They should be varied and interesting. Some, or most of them should be action oriented. Cut and paste them to a single page. Make enough copies so that each group of 2 students can share one. Then begin describing a picture (in a roundabout way for more advanced students). For example, if you've got a picture of a man riding a bicycle, you might describe it thus: In this picture, this person looks like he's going somewhere. He's not taking a car or a bus. He has to use his legs a lot to move, but he's not walking. The 2 students in each pair are competing. The first person to slap the correct image gets a point. The one with the most points wins. Also, you can compare the highest scores around the classroom to see who got the most.